3982820885 has 4 divisors (see below), whose sum is σ = 4779385068. Its totient is φ = 3186256704.

The previous prime is 3982820857. The next prime is 3982820887. The reversal of 3982820885 is 5880282893.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5880282893 = 73709 ⋅79777.

It can be written as a sum of positive squares in 2 ways, for example, as 2496101521 + 1486719364 = 49961^2 + 38558^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3982820885 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3982820887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398282084 + ... + 398282093.

It is an arithmetic number, because the mean of its divisors is an integer number (1194846267).

Almost surely, 2^3982820885 is an apocalyptic number.

It is an amenable number.

3982820885 is a deficient number, since it is larger than the sum of its proper divisors (796564183).

3982820885 is an equidigital number, since it uses as much as digits as its factorization.

3982820885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796564182.

The product of its (nonzero) digits is 2211840, while the sum is 53.

The square root of 3982820885 is about 63109.5942389111. The cubic root of 3982820885 is about 1585.1252787694.

The spelling of 3982820885 in words is "three billion, nine hundred eighty-two million, eight hundred twenty thousand, eight hundred eighty-five".